Big Hole High Hammer

Main Features of Big Hole High Hammer:

1. Using the latest rock drilling theory, optimizing the inside structure and the size of the air distrbution, to make the hammer drill tool obtain the optimal energy transfer and make it achieve faster drilling speed and lower air consumption.
2. For such projects as the drill bit break, retrieving very difficult, we specially designed a safe and reliable anti-shedding device for the bit.
3. The check valve can be replaced to replaced to the one with bigger air controlling hole to provide more efficient cutting discharge.
4. The top sub and the drive chuck have special thread, which can achieve an easier disassemble.

Applications of Big Hole High Hammer:

ANBIT provides various types of big hole drills for applications in drilling into stone, concrete, bricks, etc.. during different mining conditions. Contact us for expertise in choosing the suitable big hole hammer drill tools to meet your needs.

Technical Data of Big Hole Drill Hammer

Technical Data
Length(Without Bit)	ND142A	ND180A	ND225A	ND275A	ND330A	ND475A	ND525A
	1388mm	1520mm	1745mm	2626mm	3870mm	4080mm	4260mm
Weight(Without Bit)	102.00kg	178.00kg	315.00kg	650.00kg	1050.00kg	2775.00kg	3626.00kg
External Diameter	Ø142mm	Ø180mm	Ø225mm	Ø275mm	Ø330mm	Ø475mm	Ø525mm
Bit Shank	DHD360	QL80	NUMA100	NUMA125	ND330	ND475	ND525
Hole Range	Ø155-Ø195mm	Ø195-Ø254mm	Ø254-Ø311mm	Ø305-Ø445mm	Ø350-Ø660mm	Ø508-Ø706mm	Ø610-Ø800mm
Connection Thread	API3 1”/2REG	API4 1”/2REG	API4 1”/2REG	API6 5”/8REG	API7 5”/8REG	API8 5”/8REG	API8 5”/8REG
			API6 5”/8REG	API7 5”/8REG
Working Pressure	1.0-2.5Mpa	1.8-3.0Mpa	1.8-3.0Mpa	1.8-3.0Mpa	1.8-3.0Mpa	2.0-3.0Mpa	2.0-3.0Mpa
Impact Rate at 17 Bar	25HZ	20HZ	20HZ	20HZ	20HZ	20HZ	20HZ
Recommended Rotation Speed	20-30r/min	15-25r/min	15-25r/min	15-25r/min	15-25r/min	15-25r/min	15-25r/min
Air Consumption	1.0Mpa:9.0m³/min	1.0Mpa:12.0m³/min	1.0Mpa:22.0m³/min	1.0Mpa:28.0m³/min	1.0Mpa:32.0m³/min	1.0Mpa:56.0m³/min	1.0Mpa:50.0m³/min
	1.8Mpa:18.0m³/min	1.8Mpa:22.0m³/min	1.8Mpa:40.0m³/min	1.8Mpa:50.0m³/min	1.8Mpa:58.0m³/min	1.8Mpa:75.0m³/min	1.8Mpa:80.0m³/min
	2.4Mpa:26.0m³/min	2.4Mpa:28.0m³/min	2.4Mpa:65.0m³/min	2.4Mpa:71.0m³/min	2.4Mpa:85.0m³/min	2.4Mpa:85.0m³/min	2.4Mpa:99.0m³/min

Specifications of Big Hole High Air Pressure DTH Hammers

Item Description	Weight(kg)
	ND142A	ND180A	ND225A	ND275A	ND330A	ND475A	ND525A
1、Top Sub	20	34	59	230	320	800	960
2、 “O” Ring Of Top Sub	0.02	0.015	0.03	0.04	0.1	0.02	0.03
3、Breakout Ring		0.6	0.8	1	2	3.55	5
4、Chenck Valve	0.7	1.2	1.4	2	5	13.5	18
5、Spring	0.1	0.1	0.3	0.5	0.8	0.35	0.45
6、Air Distributor	3.5	6	10.5	16	35	58.9	79.5
7、Internal Cylinder	4.2	6.5	12.5	25	30	101.6	137
8、Piston	23	42.5	77	113	190	517	698
9、External Cylinder	31.5	60	110	170	316	952	1285
10、Guided Sleeve	6.5	6.3	4.5	23	38	98	132
11、“O” Ring Of Stop Ring	0.01	0.01	0.02	0.03	0.05	0.02	0.02
12、Stop Ring	0.6	1.4	1.9	4	6	14.25	19.5
13、Breakout Ring	0.2	0.6	0.8	1	2	3.55	5
14、Drive Chuck	5	12	21	34	64	162	219
15、Retainer	3.5	6.5	9	30	42	50	67.5
16、Drill Bit	27	37	68	185	240	528	1328